Nullboard - Minimalist locally-stored kanban board / task list manager.
Traq - Traq is a PHP powered project manager and issue tracker featuring multiple projects, milestones...
Huboard - HuBoard is built from the ground up using the GitHub public API.
16bugs - 16bugs is an all-in-one bug tracking software that makes it easier for you to manage all sorts of bugs in performance with the simple interface; ultimately, you will be more productive for sure.
Zube - Project management for developers.
PlayNice.ly - PlayNice.ly is a blazing issue tracking software, making it easy for you developers to find out all the major bugs and errors.